If you are using turbotax installed on your computer (which you pretty much have to be at this point) you can click the "Forms" button at the top to switch to forms view. There may be a home office worksheet, and then your home office expenses will go either to a schedule C (if you are self employed) or form 2106 and schedule A (if you are a W-2 employee).
If you are a schedule C independent contractor, about the only reason you wouldn't get the home office deduction is if you did not earn a business profit. Compare the schedule C currently in your tax file with the one you originally filed. Also look at your current form 1040 line 12 compared with the return you filed.
If you are a W-2 employee, your work related deductions on form 2106 are limited by 2% of your gross income and then go to schedule A where you must itemize your deductions to get any benefits. So, if your income was let's say, $50,000, then your work deductions have to be more than $1000 before you can take anything. And if your total itemized deductions are less than the standard deduction, you still won't get anything for the home office because the standard deduction is better. Check your form 2106 and your schedule A, and compare your current form 1040 line 40 with the return you filed.
